Heater Matrix - Bypass Question

[VIL]

Chaps can anyone advise.

I have a Peugeot 1.9 Diesel estate that has blown the matrix for a second time (weak point on these cars).

Its at the point of beyond economical repair, although the car is quite useful to have.

My question is am I better to join the inlet and outlet pipes together or to blank them off?

I know I run the risk of head gasket problems but if i can squeeze a little bit more life out of the car then I would be happy.

Cheers

[uk-rich]

i would always "bypass" them rather than blank them off, on any application

[VIL]

Cheers Rich, bythat do you mean join the pipes together?

[JustGav]

i would always "bypass" them rather than blank them off, on any application

Not always...

There has been a 'possible' problem identified with bypassing the matrix on a supra...

[VIL]

Gav I know you have posted on previous matix bypass threads, in this situation what would be your recommendation?

[uk-rich]

its best not to bypass, but if the matrix is f@@ked there is little choice, i would join the 2 together rather than just plug them up

[JustGav]

To be fair.. in this case if it isn't economically feasible to put a new matrix in, I'd be tempted to run the risk, bypass it, and it should be okay. As was pointed out in an earlier thread, you probably find the matrix doesn't have a negative on the cooling system on a newer car.

I'll see if I can find a peugeot diagram to confirm this, I'm sure I've got one somewhere for the 1.9 engine...

[VIL]

Cheers Gav, really apreciate this!

If I can get a bit more life out of her then its worth it as the alternative is off to the scrap yard with her anyway.....

[JustGav]

Which pug is it?

[VIL]

Hi Gav

Its a lovely Peugeot 405 1994 1.9 (non-turbo) diesel estate.

Beautiful........!

[Digsy]

As was pointed out in an earlier thread, you probably find the matrix doesn't have a negative on the cooling system on a newer car.

Really? I would have thought it was the other way around. Modern cars usually run the heater as a permanent connection (unlike the Supe which has a coolant control valve). If the system is designed to work with the heater matrix restriction always in place, then bypassing it will probably cause problems.

[ardasaliah]

Gav I know you have posted on previous matix bypass threads, in this situation what would be your recommendation?

why don't yo justy get some cheap matrix form ebay or somthing and fit it iwth some extra tubing- but leave it under the bonnet- preferable near some sort of air flow. ? just an idea to avoid headgasket problems